git-commit-vandalism/Documentation/git-patch-id.txt
Jonathan Nieder b1889c36d8 Documentation: be consistent about "git-" versus "git "
Since the git-* commands are not installed in $(bindir), using
"git-command <parameters>" in examples in the documentation is
not a good idea. On the other hand, it is nice to be able to
refer to each command using one hyphenated word. (There is no
escaping it, anyway: man page names cannot have spaces in them.)

This patch retains the dash in naming an operation, command,
program, process, or action. Complete command lines that can
be entered at a shell (i.e., without options omitted) are
made to use the dashless form.

The changes consist only of replacing some spaces with hyphens
and vice versa. After a "s/ /-/g", the unpatched and patched
versions are identical.

Signed-off-by: Jonathan Nieder <jrnieder@uchicago.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-01 17:20:15 -07:00

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git-patch-id(1)
===============
NAME
----
git-patch-id - Compute unique ID for a patch
SYNOPSIS
--------
'git patch-id' < <patch>
DESCRIPTION
-----------
A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
whitespace and line numbers ignored. As such, it's "reasonably stable", but at
the same time also reasonably unique, i.e., two patches that have the same "patch
ID" are almost guaranteed to be the same thing.
IOW, you can use this thing to look for likely duplicate commits.
When dealing with git-diff-tree output, it takes advantage of
the fact that the patch is prefixed with the object name of the
commit, and outputs two 40-byte hexadecimal string. The first
string is the patch ID, and the second string is the commit ID.
This can be used to make a mapping from patch ID to commit ID.
OPTIONS
-------
<patch>::
The diff to create the ID of.
Author
------
Written by Linus Torvalds <torvalds@osdl.org>
Documentation
--------------
Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
GIT
---
Part of the linkgit:git[1] suite